The option that can prevent people from snooping on a device that you leave unattended for several minutes is:
Configuring a lock-out time
This feature will automatically lock your device after a set period of inactivity, making it difficult for someone to access your information if you leave the device unattended.
Using a strong password is essential for security, but it won't help if the device is left unlocked. Disabling WiFi does not protect the device itself, and shoulder surfing refers to someone observing your screen, which doesn’t prevent snooping if the device is accessible.